In issue 15, Greg suggests that shallow squatting places undue stress on the knees, and that squatting to the depth at which lordosis can be maintained and attempting to incrementally increase that depth over time is ineffective at best and potentially harmful at worst.

In issue 20, Robb suggests as a strategy for increasing squat depth to do exactly what Greg adivsed against!

My question is, what IS a good strategy for increasing squat depth while concomitantly increasing hamstring flexibility?